Graco 241705 Operation manual

Instructions -- Parts List
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440- 1441
Copyright 2002, Graco Inc. is registered to I.S. EN ISO 9001
Texture Airless Spray Gun
27.6 MPa (276 bar, 4000 psi) Maximum Working Pressure
Part No. 241705, Series B
Includes a RACrTip Guard and LTX531 Switch Tipr
Part No. 289605 (Europe Only), Series B
Includes a RACrTip Guard and HDA531 Switch Tipr
308491S
03965
II 2 G
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
See page 2 for Table of Contents.

3084912
Table of Contents
Symbols 2.................................
Warnings 3.................................
Installation/Operation 5......................
System Requirements 5...................
Ground the System 5......................
How to Use the Gun Trigger Safety 5........
Pressure Relief Procedure 5................
HowtoUsetheGun 6.....................
How to Adjust the Spray Pattern 6...........
Care of the Spray Tip and Tip Guard 7.......
How to Flush the Gun 8....................
How to Check the Gun Diffuser Operation 9..
Service 10.................................
Parts 14...................................
Technical Data 15...........................
Dimensions 15..............................
Graco Phone Numbers 15....................
The Graco Warranty and Disclaimers 16.......
Symbols
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
corresponding instructions.

308491 3
SKIN INJECTION HAZARD
Spray from the gun, leaks or ruptured components can inject fluid into your body and cause ex-
tremely serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin
can also cause serious injury.
DFluid injected into the skin may look like just a cut, but it is a serious injury. Get immediate surgi-
cal treatment.
DDo not point the spray gun at anyone or any part of the body.
DDo not put hand or fingers over the spray tip.
DDo not stop or deflect fluid leaks with your hand, body, glove or rag.
DDo not “blow back” fluid; this is not an air spray system.
DAlways have the tip guard and the trigger guard on the spray gun when spraying.
DCheck the gun diffuser operation weekly. Refer to the gun manual.
DBe sure the gun trigger safety operates before spraying the gun.
DLock the gun trigger safety when you stop spraying.
DFollow the Pressure Relief Procedure on page 5 if the spray tip clogs and before cleaning,
checking or servicing the equipment.
DTighten all fluid connections before each use.
DCheck the hoses, tubes and couplings daily. Replace worn or damaged parts immediately. Per-
manently coupled hoses cannot be repaired.
DHandle and route hoses and tubes carefully. Keep hoses and tubes away from moving parts and
hot surfaces. Do not kink or over bend the hoses or use the hoses to pull equipment. Do not
expose Graco hoses to temperatures above 180_F(82_C) or below --40_F(--40_C).
FIRE AND EXPLOSION HAZARD
Improper grounding, poor air ventilation, open flames or sparks can cause a hazardous condition
and result in a fire or explosion and serious injury.
DGround all equipment in the work area. See Ground the System on page 5.
DIf there is any static sparking while using the equipment, stop spraying immediately. Identify
and correct the problem.
DProvide fresh air ventilation to avoid the buildup of flammable vapors from solvent or the fluid be-
ing sprayed.
DDo not smoke in the spray area.
DExtinguish all open flames or pilot lights in the spray area.
DDo not turn on or off any light switch in the spray area.
DElectrically disconnect all equipment in the spray area.
DKeep the spray area free of debris, including solvent, rags and gasoline.
DDo not operate a gasoline engine in the spray area.
DKeep a fire extinguisher in the work area.
WARNING
WARNING

3084914
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture, malfunction or start unexpectedly and result
in serious injury.
DThis equipment is for professional use only.
DRead all instruction manuals, tags, and labels before operating the equipment.
DUse the equipment only for its intended purpose. If you are in doubt about this, call your Graco
distributor.
DDo not alter or modify this equipment.
DCheck equipment daily. Repair or replace worn or damaged parts immediately.
DDo not exceed the maximum working pressure of the lowest rated system component. Refer to
the Technical Data on page 15 for the maximum working pressure of this equipment.
DDo not move or lift pressurized equipment.
DUse fluids or solvents which are compatible with equipment wetted parts. Refer to the Technical
Data section on page 15 and all equipment manuals. Read the fluid and solvent manufacturer’s
warnings.
DDo not use 1,1,1--trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or
fluids containing such solvents in pressurized aluminum equipment. Such use could result in a
chemical reaction, with the possibility of explosion.
DFluid hoses must have spring guards on both ends to protect them from rupture caused by kinks
or bends at or close to the couplings.
DComply with all applicable local, state and national fire, electrical and other safety regulations.
TOXIC FLUID HAZARD
Improper handling of hazardous fluids or inhaling toxic fumes can cause extremely serious injury,
even death, due to splashing in the eyes, ingestion, or bodily contamination.
DKnow the specific hazards of the fluid you are using.
DStore hazardous fluid in an approved container. Dispose hazardous fluid according to all local,
state and national guidelines.
DWear appropriate clothing, gloves, eyewear and respirator.
RECOIL HAZARD
Due to the high pressure fluid emitted, a strong recoil action may occur when you trigger this gun. If
you are unprepared, your hand could be forced back toward your body or you could lose your bal-
ance and fall, resulting in serious injury.
WARNING
WARNING
INSTRUCTIONS

308491 5
Installation/Operation
System Requirements
WARNING
Keep the wallet-sized warning card provided with
this gun with the operator at all times. The card
contains important treatment information should an
injection injury occur. Additional cards are available
at no charge from Graco Inc.
1. The pressure drain valve assists in relieving fluid
pressure in the displacement pump, hose and gun;
triggering the gun to relieve pressure may not be
sufficient.
2. Strain the fluid you are spraying if it contains
particles which could clog the spray tip.
Ground the System
WARNING
To reduce the risk of static sparking, ground the
pump and all other equipment used or located in
the spray area. Check your local electrical code for
detailed grounding instructions for your area and
type of equipment. Also follow the grounding
instructions provided in your pump or sprayer
manual. The gun obtains grounding through con-
nection to a properly grounded fluid hose and pump
or sprayer. Also read FIRE OR EXPLOSION HAZ-
ARD on page 3.
How to Use the Gun Trigger Safety
1. To lock the gun trigger safety, turn the safety to a
right angle with the gun body. See Fig. 1.
2. To unlock the gun trigger safety, push the safety
out and turn it parallel with the gun body.
See Fig. 1.
Pressure Relief Procedure
To reduce the risk of serious injury, including fluid
injection, splashing fluid or solvent in the eyes or
on the skin, follow this procedure when you are
instructed to relieve pressure, when you stop
spraying, shut off the pump, check or service any
system equipment, or install, clean or change spray
tips.
WARNING
1. Lock the gun trigger safety.
2. Shut off the power to the pump.
3. Unlock the gun trigger safety.
4. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
5. Lock the gun trigger safety.
6. Open the drain valve, having a container ready to
catch the drainage. Observe the pressure gauge.
The gauge reads 0 psi/bar when fully drained.
Leave the drain valve open until you are ready to
spray again.
If you suspect that the spray tip or hose is completely
clogged or that pressure has not been fully relieved,
very slowly loosen the tip guard retaining nut or hose
end coupling and relieve pressure gradually. Clean the
tip or hose obstruction.
Fig. 1
1
2
Gun trigger safety shown locked
Gun trigger safety shown unlocked
1
2
03966

3084916
Installation/Operation
How to Operate the Gun
WARNING
To reduce the risk of component rupture, and seri-
ous injury, including fluid injection, do not exceed
the gun’s 4000 psi (276 bar, 27.6 MPa) Maximum
Working Pressure or the maximum working pres-
sure of lowest rated component in the system.
04731
Fig. 2
30
8A
1. Connect an electrically conductive fluid hose (A) to
the gun inlet. See Fig. 2.
2. With no tip installed, start the pump. Flush the
pump according to the instructions supplied with it.
Use the lowest pressure possible. Prime the
system with the material.
3. Relieve pressure.
4. Install the SwitchTip (8) and tip guard (30). Follow
the i nstructions in the manual, supplied.
See Fig. 2.
5. Start the pump. Trigger the gun onto test paper.
Adjust the fluid pressure until the spray is
completely atomized. Use the lowest pressure
necessary to get the desired results. Higher pres-
sure may not improve the spray pattern and will
cause premature tip and pump wear.
6. If adjusting the pressure does not give a good
spray pattern, relieve pressure and then try
another tip size.
7. Use a full-open, full-close trigger action. Hold the
gun about 14 in. (350 mm) from and at right angles
to the work surface. Don’t swing the gun in an arc.
Practice to find the best length and speed of
stroke.
How to Adjust the Spray Pattern
1. To adjust the spray pattern direction, relieve pres-
sure. Loosen the tip guard retaining nut (B). Turn
the tip guard/tip groove horizontally (C) for a hori-
zontal pattern and vertically (A) for a vertical
pattern. Tighten the nut. See Fig. 3.
2. The spray tip orifice and spray angle determines
the coverage and size of pattern. When more
coverage is needed, use a larger spray tip rather
than increasing fluid pressure.
CAUTION
Openings in the tip guard reduce paint buildup on
the guard while spraying. Damage to the sharp
edges of the openings causes paint to collect at
that area. Never hang the gun by the tip guard.
Fig. 3
A
B
C
03968

308491 7
Installation/Operation
Care of the Spray Tip and Tip Guard
WARNING
To reduce the risk of fluid injection or splashing in
the eyes or on the skin, do not hold a hand, body
or rag in front of the spray tip when cleaning or
checking a clogged tip. Point the gun toward the
ground or into a waste container when checking to
see if the spray tip is cleared.
Do not try to “blow back” paint; this is not an air
spray gun.
Do not wipe fluid buildup off the gun or spray tip
until pressure is relieved.
Cleaning during the day
WARNING
SKIN INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 5.
1. Relieve pressure.
2. Clean the front of the tip frequently during the day
to help reduce buildup. Also clean the tip and tip
guard at the end of each work day. Use a solvent-
soaked brush to clean the spray tip.
If the spray tip clogs while spraying
1. Stop spraying immediately.
2. Lock the gun trigger safety. Rotate the RAC IV tip
handle back 180_. See Fig. 4.
3. Unlock the gun trigger safety. Trigger the gun into
a pail or onto the ground to remove the clog.
4. Lock the gun trigger safety. Rotate the tip handle
to the spraying position. See Fig. 4.
5. If the tip is still clogged, engage the gun trigger
safety, shut off the sprayer and disconnect the
power source, and open the pressure drain valve
to relieve pressure. Clean the spray tip as shown
in manual 308644, supplied with the RAC IV.
CAUTION
Never soak the entire gun in solvent. Prolonged
exposure to solvent can ruin the packings.
Fig. 4
Spraying position shown.
Turn handle 180_and
trigger gun to clear clog.
1
103965

3084918
Installation/Operation
How to Flush the Gun
WARNING
To reduce the risk of serious injury, including
splashing fluid in the eyes or on the skin, or static
electric discharge when flushing:
DBe sure the entire system, including flushing
pails, are properly grounded.
DRemove the tip guard and spray tip.
DMaintain metal to metal contact between the
gun and the flushing pail.
DUse the lowest possible pressure.
04735
Always flush the pump and gun before the fluid being
sprayed can dry in it.
NOTE: This procedure requires a grounded pail of
compatible solvent.
1. Relieve pressure.
2. Remove the tip guard and spray tip. Soak and
clean the parts.
3. Remove the pump intake from the original pail.
4. Put the pump intake in a grounded pail of compat-
ible solvent.
5. Start the pump at its lowest pressure.
6. Trigger the gun into the original pail. When solvent
appears, release the trigger.
7. Now trigger the gun into the solvent pail. Circulate
the fluid until the system is thoroughly flushed.
8. Relieve pressure.

308491 9
Installation/Operation
How to Check the Gun Diffuser Operation
The Standard Needle and Seat Kit, 237398, has the
number 090 stamped on the needle and seat. The seat
does have a diffuser.
The optional Non-diffused Needle and Seat Kit,
237260, has the number 125 stamped on the needle
and seat. The seat does not have a diffuser.
The diffuser, located in the valve seat, creates an
irregular spray pattern when the gun is sprayed
without a tip guard, such as during cleaning. This
reduces the risk of an injection injury.
If you are using the optional Kit 237260, you must
take extra precautions to keep your hands and
body away from the nozzle of the gun.
Always have the tip guard in place during regular
spraying operations.
WARNING
Check the diffuser operation weekly. The gun diffuser/
seat (2a) breaks up spray and reduces the risk of fluid
injection when the tip is not installed. Perform the test
below. If it fails, replace the entire Needle and Seat Kit.
Diffuser/seats and needles are not sold separately;
using old parts with new ones will result in leakage.
WARNING
SKIN INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 5.
1. Relieve pressure.
2. Remove the tip guard and spray tip.
3. Start the sprayer and adjust it to the lowest
pressure.
4. Aim the gun into a grounded metal pail while hold-
ing it firmly to the pail. Trigger the gun. If the fluid
emitted is not diffused into an irregular stream,
replace the entire needle kit immediately. See Fig.
5.
Fig. 5
1Irregular spray pattern
1
2a
04735

30849110
Service
To reduce the risk of serious injury from fluid injec-
tion or splashing, always follow the Pressure
Relief Procedure on page 5 before servicing the
gun.
WARNING
Repair Notes
The needle and seat are available only as a kit which
includes items 2a to 2e.
The Standard Needle and Seat Kit, 237398, has the
number 090 stamped on the needle and seat.
A Non-diffused Needle and Seat Kit, 237260, has the
number 125 stamped on the needle and seat. It is rec-
ommended only for use with mastics, sealers and
other high viscosity materials which have fillers that
cannot pass through the standard seat’s diffuser.
Use high quality, general purpose grease where
grease is indicated.
Disassembly
NOTE: If replacing only the needle and seat, Step 4
and 5 are not required. However, removing them
allows you to clean the gun more thoroughly.
1. Relieve pressure.
Fig. 6
30
21
A
04731
2. Disconnect the fluid hose (A). Remove the tip
guard (30). Unscrew the spring screw (21) about
1/4 in. (7 mm) to release spring tension.
See Fig. 6.
Fig. 7
2a 2b
03969
3. Unscrew the valve seat (2a). Remove the gasket
(2b). See Fig. 7.
Fig. 8
29
28
27
18
25
0473
2
4. Remove one e-clip (27). Push out the pin (18).
Remove the screw (29), pivot pin (28), and trigger
(25). See Fig. 8.
Fig. 9 24 04733
5. Remove the screws (24). See Fig. 9.